Pappy, your new tires have a higher load index (though not necessarily ply rating) and are capable of holding more air pressure and this more weight. Load index is the 2 digit number next to the speed rating ( ex: 94H). The correct way to determine inflation for these new tires would be to go to the load index chart in the "Tire Guide" (every tire store will have one), look up the old load index (ex 92) and cross reference the car maker's suggested inflation with the weight in the book- then cross reference this weight with the proper inflation for the new load index (should be higher). Simpler, just add 9 lbs- it will probably put you in the ball park. That being said- on modern radials, you will almost NEVER see one fail due to OVER inflation- infact, you will be hard pressed to find one in a million scrap tires that even exhibit signs of over inflation. Modern tires fail or wear prematurely for these reasons- road hazards/ impacts (made more susceptable by low inflation), alignment wear (also exagerated by low inflation), and low inflation. AIR 'EM UP!
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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